Details for: CL0000126

Cell ID: CL0000126

Cell Name: macroglial cell

Description: A neuroglial cell of ectodermal origin, i.e., the astrocytes and oligodendrocytes considered together.

Synonyms: macrogliocyte, macroglia

Selected Context(s): Overall

Gene Significance Landscape

Display Options
Score:
Display
Genes

Contexts:

Cell Significance Index (CSI) is uniquely calculated to reveal cell-specific gene markers. More info here

Significant Genes List

Genes with the highest and lowest Percentile Rank Scores (PRS) for macroglial cell within the selected context(s).

Gene ID: A unique numerical identifier for this specific gene.
Symbol: Shortened abbreviation or name that represents this gene.
Ensembl Gene ID: A unique identifier assigned by Ensembl for genomic data mapping.
CSI Score: A combined effect size and statistical significance measure for macroglial cell. Higher scores indicate a stronger, more significant difference in expression.
(Previously described as "Fold Change", but now represents Cliff's Delta × –log10(p).)

Gene ID: A unique numerical identifier for this specific gene.
Symbol: Shortened abbreviation or name that represents this gene.
Ensembl Gene ID: A unique identifier assigned by Ensembl for genomic data mapping.
CSI Score: A combined effect size and statistical significance measure for macroglial cell. Higher scores indicate a stronger, more significant difference in expression.
Average CSI: csi sum / gene count
Cell network configuration

This network visualizes key genes for macroglial cell. It primarily includes:
1. Top genes highly significant for this cell (Num. Top Cell Genes - based on the 'Min. CSI' setting).
2. Any additional specific 'Context Genes' you add below.
The final network is a combined view. Choose an Interaction Source (pathways or protein interactions) and optionally compare CSI scores with a Baseline Cell Type.

Maximum number of selected genes.
Select a context for the baseline cell.
Select a context for the target cell.
Target Cell for CSI:  macroglial cell (CL0000126)

 Legend
Nodes (Genes):
 Query Gene
Node size also reflects Target Cell CSI magnitude.
Node Color (Target Cell CSI in specific network):
 Very High
 High
 Medium
 Low
 Very Low
 N/A or Not Sig.
Edges (Interactions):
 STRING (Protein-Protein)
 ONTOLOGY (Shared Pathway)
 Colors vary by pathway category; default arrow applies.

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## Summary The [macroglial cell](/details-cell/CL0000126), a category encompassing astrocytes and oligodendrocytes, is defined by a highly specific gene expression profile centered on neurodevelopment, cell-to-cell signaling, and the regulation of synaptic function. The top markers, as indicated by high Z-score based Cell Significance Index (CSI), are not ubiquitously expressed structural proteins but rather specialized regulatory and signaling molecules. The exceptional specificity of the non-coding RNA [MIR9 1HG](/details-gene/10485) (CSI: 47.30) and the signaling ligand [NRG3](/details-gene/10718) (CSI: 37.19) suggests that these cells maintain their identity through fine-tuned post-transcriptional regulation and active communication within the neural microenvironment. ## Key Characteristics and Function **Overall**, the gene signature of [macroglial cells](/details-cell/CL0000126) points to a multifaceted role in nervous system architecture and function, organized around several key biological themes. * **Synaptic Modulation and Neurotransmitter Receptor Expression:** A prominent feature of this cell type is the expression of genes involved in neurotransmission. This includes subunits for both inhibitory ([GABRB1](/details-gene/2560), a GABA-A receptor) and excitatory ([GRIA4](/details-gene/2893), an AMPA-type glutamate receptor) signaling systems. The high significance of [ADCY8](/details-gene/114), a calcium-sensitive adenylate cyclase, and [KCND2](/details-gene/3751), a voltage-gated potassium channel, further indicates that macroglia are not passive support cells but are equipped to sense and actively modulate neuronal excitability and synaptic plasticity. * **Cell Adhesion and Axon Guidance:** Macroglia play a crucial role in organizing neural circuits, a function reflected by the high CSI scores for cell adhesion molecules. These include [TNR](/details-gene/7143) (Tenascin-R), [CNTN1](/details-gene/1272) (Contactin-1), [NRXN3](/details-gene/9369) (Neurexin-3), and [DSCAM](/details-gene/1826). This molecular toolkit is essential for mediating interactions with neurons and other glia, guiding axonal growth, and maintaining the structural integrity of the extracellular matrix. * **Growth Factor Signaling and Myelination:** The neuregulin family is critical for glial development, and the high specificity of [NRG3](/details-gene/10718) is consistent with this role. Research indicates that [NRG3](/details-gene/10718) signaling via its receptor ErbB4 is involved in oligodendrocyte survival, a key function of a major macroglial subpopulation ([Link](https://doi.org/10.1242/jcs.02799)). This highlights a direct involvement in the formation and maintenance of myelin sheaths. * **Cytoskeletal Organization:** The complex morphology of astrocytes and oligodendrocytes requires a robust and dynamic cytoskeleton. The high significance of microtubule-associated proteins [MAPT](/details-gene/4137) (Tau) and [MAP1B](/details-gene/4131) underscores the importance of microtubule organization for establishing and maintaining the elaborate processes that interact with synapses and wrap axons. * **Negative Markers and Metabolic Profile:** The anti-marker profile is particularly revealing. There is a striking negative enrichment for multiple genes encoding core subunits of the mitochondrial electron transport chain, including [COX1](/details-gene/4512), [COX2](/details-gene/4513), [COX3](/details-gene/4514), [CYTB](/details-gene/4519), and [ATP6](/details-gene/4508). This does not imply an absence of mitochondria but strongly suggests that, relative to other cell types in this analysis, [macroglial cells](/details-cell/CL0000126) have a distinct metabolic profile with a potentially lower reliance on oxidative phosphorylation. This is complemented by the low significance of genes involved in general protein synthesis like [EEF1B2](/details-gene/1933), indicating a highly specialized, rather than a broadly anabolic, cellular state. ## Clinical Significance and Contextual Roles As this analysis is based on an **Overall** context, it represents a composite signature and does not distinguish between healthy and diseased states. However, the top marker genes are implicated in a wide range of neurological and psychiatric disorders. The high specificity of [MAPT](/details-gene/4137) is clinically significant, as aberrant forms of the Tau protein are the primary component of neurofibrillary tangles in Alzheimer's disease and other tauopathies. The expression of [NRG3](/details-gene/10718) has been associated with schizophrenia and highlights the role of glial signaling in major psychiatric illnesses. Furthermore, [DSCAM](/details-gene/1826) is located in a critical region for Down syndrome, and its role in neural development is well-established ([Link](https://doi.org/10.1093/hmg/7.2.227)). The enrichment for ion channels and neurotransmitter receptors like [GABRB1](/details-gene/2560) and [GRIA4](/details-gene/2893) suggests that macroglia are potential therapeutic targets for conditions involving network hyperexcitability, such as epilepsy. The strong negative signature for mitochondrial respiratory genes could also be relevant, suggesting a unique vulnerability or protective mechanism in diseases with a metabolic component, such as stroke or neurodegeneration. ## Potential Mechanisms and Research Directions 1. **Hypothesis: Macroglial identity and function are maintained by a post-transcriptional regulatory layer orchestrated by microRNA-9.** * **Surprising Findings:** The emergence of two non-coding RNA host genes, [MIR9 1HG](/details-gene/10485) and [MIR9 2HG](/details-gene/645323), as the most specific markers is notable. It suggests that the stable phenotype of mature [macroglial cells](/details-cell/CL0000126) relies heavily on miRNA-mediated silencing of alternative lineage programs and fine-tuning of target mRNAs, rather than solely on the expression of a single master transcription factor. * **Testable Questions:** Does conditional deletion of *MIR9* loci in glial progenitor cells result in differentiation defects or the aberrant expression of neuronal or microglial genes? Can pull-down assays using biotinylated miR-9 identify key mRNA targets, and do these targets include genes from the anti-marker list? 2. **Hypothesis: Macroglial cells exhibit a specialized metabolic state characterized by reduced oxidative phosphorylation, potentially to support neuronal energy needs.** * **Surprising Findings:** The coordinated and strong negative CSI scores for numerous essential components of the mitochondrial electron transport chain ([COX1](/details-gene/4512), [COX2](/details-gene/4513), [ATP6](/details-gene/4508), etc.) is a striking finding. For cells that perform energetically demanding tasks like glutamate uptake and ion buffering, a lower-than-average reliance on the most efficient ATP production pathway is counterintuitive and points towards a specialized metabolic adaptation, such as the astrocyte-neuron lactate shuttle. * **Testable Questions:** Do primary cultures of astrocytes or oligodendrocytes show a lower ratio of oxygen consumption rate (OCR) to extracellular acidification rate (ECAR) compared to co-cultured neurons when measured by extracellular flux analysis? Does inhibiting glycolysis disproportionately compromise macroglial function compared to inhibiting oxidative phosphorylation?